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And Command
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And Command
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The AND command forces two or more resources to work together at the same time. For the AND command the scheduler compares all the resources within a AND block, which includes the prime operation, and sets up a combined hours per shift per operation for the AND block. That is, the constraints of all resources within the AND block are taken into consideration when scheduling. Any number of AND resources are allowed per operation up to the maximum operation count of 500 for a job.
If you are using resource pools with AND commands you must make sure that the resources in the pools are compatible. That is, if one pool uses resources with shift 1 and the other pool uses resources with shift 2, trying to use a AND between these two pools will result in an incompatible AND and the operation will not be scheduled.
Resources that are required only for setup or runtime can be specified with an AND command by entering only setup time or runtime for the given resource. In the example below, the prime operation's resource is required for the entire length of the operation. The first AND has setup time only and is thus scheduled only for setup. The second AND command has runtime only and thus is scheduled only for the runtime portion of the operation.
If wait time or move time is required for the AND command, the wait and move time should be given on the prime operation (the first operation in the AND block) only. Any wait time or move time entered to the And operations are ignored and automatically set to 0 by the scheduler.
The example below shows operation 10 with an AND command. The CNC 3A1 resource is scheduled to occur at the same time as the Assembly resource:
You can mix AND commands with OR commands. In the example below, operation 10 can use:
